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Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings / Jari Vartiainen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings Type de document : texte imprimé Auteurs : Jari Vartiainen, Auteur ; Klaus Rose, Auteur ; Yukihiro Kusano, Auteur ; Juha Mannila, Auteur ; Lisa Wikström, Auteur Année de publication : 2020 Article en page(s) : p. 305-314 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Brillance (optique)
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Copolymères
Couches minces
Hydrophobie
Matériaux -- Propriétés barrières
Matières plastiques -- Revêtement
Microscopie électronique à balayage
Nanofibres
Rugosité
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : Single-layer films from cellulose nanofibrils on a plastic support were coated with sol–gel coated with inorganic–organic copolymers (ORMOCER®s), consisting of inorganic Si–O–Si-based networks combined with ceramic (Al–O– and Zr–O–) groups and special organic fluoroalkyl chain containing functional groups. Sol–gel coatings decreased the surface hydrophilicity and water vapor transmission rate. The water contact angle of uncoated films was 24°, indicating high affinity between water and the cellulose nanofibrils. All sol–gel coatings tested increased the surface hydrophobicity with the contact angles ranging between 54° and 102°. The water vapor transmission rates varied between 230 and 410 g/m2/day. With UV curable highly organically crosslinked coating, the water vapor transmission rate was decreased by 77% as compared to uncoated film. The uncoated film had oxygen transmission rates of 0.7 and 107 cc/m2/day at 50% and 80% RH, respectively. At high humidity conditions, the films tended to swell, thus allowing permeation to increase. Sol–gel coatings significantly improved the oxygen barrier properties especially at 80% RH. The transmission rates varied between 0.4 and 0.5 cc/m2/day (50% RH) and between 51 and 86 cc/m2/day (80% RH). Note de contenu : - Cellulose nanofibrils (CNF) and CNF films
- Sol-gel coatings
- Scanning electron microscopy (SEM)
- Roughness
- Gloss
- Contact angle measurements
- Oxygen permeation
- Water vapor permeationDOI : 10.1007/s11998-019-00292-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00292-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33747
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 1 (01/2020) . - p. 305-314[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Impact of extender minerals in UV varnish / Janet S. Preston in EUROPEAN COATINGS JOURNAL (ECJ), (11/2023)
[article]
Titre : Impact of extender minerals in UV varnish : The right balance of gloss, matting, haze and clarity for printed products Type de document : texte imprimé Auteurs : Janet S. Preston, Auteur ; Anabelle Elton-Legrix, Auteur ; Andrew Curtis, Auteur ; Amandine Briand, Auteur Année de publication : 2023 Article en page(s) : p. 24-28 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique)
Carbonate de calciumLe carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Charges (matériaux)
Kaolin
MatitéÉtat de ce qui est mat : La matité d'un son, d'une couleur. (Larousse)
Revêtements organiques
Silicates
Talc
Vernis
Vernis -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : Extenders such as calcium carbonate, kaolin and talc are often added to inks and varnishes to impart technical benefits and make formulations more cost effective. The optical performance of UV-curing varnishes is key. The optimum mineral type and loading help to control the gloss level without compromising transparency, clarity or mechanical resistance. We analysed a range of fillers to assess their benefits. Note de contenu : - Cost-effective increase in mechanical strength with good matting
- Experimental
- Precipitated silicate for good matting results at low loading
- The challenge to obtain high clarity and low gloss
- Mineral filler reinforces the varnish for increased durability
- Desired surfaces without sacrificing transparency
- Table 1 : Amount of filler required to obtain the 3 different target gloss values (at 60° angle), and the effect on haze and clarity of the filled varnishEn ligne : https://drive.google.com/file/d/1Dz691YHfOZdFmZoFYIMsrKBhxBjFCbn6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40084
in EUROPEAN COATINGS JOURNAL (ECJ) > (11/2023) . - p. 24-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24302 - Périodique Bibliothèque principale Documentaires Disponible Impact of extenders in TiO2 reduction and curing efficiency in UV cured flexo ink / Amandine Briand in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4657 (12/2019)
[article]
Titre : Impact of extenders in TiO2 reduction and curing efficiency in UV cured flexo ink Type de document : texte imprimé Auteurs : Amandine Briand, Auteur ; Anabelle Elton-Legrix, Auteur ; Andrew Curtis, Auteur ; Janet S. Preston, Auteur Année de publication : 2019 Article en page(s) : p. 24-28 Langues : Anglais (eng) Catégories : Brillance (optique)
Carbonate de calciumLe carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Dioxyde de titane
Encre -- Séchage sous rayonnement ultraviolet
Encre flexographique
Extendeurs
Formulation (Génie chimique)
Kaolin
Réflectance
Talc
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : The use of ultraviolet light to cure inks in the packaging printing industry has become increasingly common since it has been first developed. lndeed, the need for more visual appeal in packaging, with quicker curing rates and lower waste, has been one of the drivers behind this growth. TiO2 is the most commonly used pigment in white UV cured flexo ink due to its high refractive index providing high opacity even at thin film thickness. Unfortunately, absorbs a portion of the UV spectrum and has a detrimental effect on the curing of the ink. In addition, a high loading of TiO2 can be detrimental to the optical performance due to crowding of particles.
This paper reports how calcium carbonate, kaolin and talc can partially substitute TiO2 in UV-cured flexo inks, whilst still maintaining a high gloss and suitable opacity. In addition, the impact of extenders on the curing efficiency has been evaluated.Note de contenu : - Experimental/methodology
- Results - Curing properties of the inks
- Results - TiO2 reduction - Impact on optical properties
- Table 1 : UV flexo white ink formulation
- Fig. 1 : Photos of an UV ink cured after five passes
- Fig. 2 : Example of FT-IR of an uncured vs cured ink
- Fig. 3 : Comparison of peak reduction with different extender vs TiO2
- Fig. 4 : Reflectance of different minerais in the UV spectral range
- Fig. 5 : Percentage peak reduction at high and low loading of photoinitiator with Ti02 and fine GCC
- Fig. 6 : Viscosity at 10s-1 of the inks at 5% TiO2 reduction
- Fig. 7 : Measured reflectance vs g/m2
- Fig. 8 : Calculated reflectance at 14.5g/m2 (left) and 4.5g/112
- Fig. 9 : Calculated reflectance at 14.5g/ m2at 10% TiO2 reduction
- Fig. 10 : Ti02 scattering and crowding effect on opacity
- Fig. 11 : Film thickness needed to achieve a reflectance of 40 with extenders
- Fig. 12 : Calculated gloss at 14.5g/m2at 5% Ti02 reduction
En ligne : https://drive.google.com/file/d/1uCu9AZMdWYFon_xtrBTPO5nE4kC_aGKj/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33396
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 209, N° 4657 (12/2019) . - p. 24-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21487 - Périodique Bibliothèque principale Documentaires Disponible Improving hair thickening with amaranth peptides / Mihaela Gorcea in GLOBAL PERSONAL CARE, Vol. 23, N° 3 (03/2022)
[article]
Titre : Improving hair thickening with amaranth peptides Type de document : texte imprimé Auteurs : Mihaela Gorcea, Auteur ; Saso Efremovski, Auteur ; Vivianna Chapparo, Auteur Année de publication : 2022 Article en page(s) : p. 55-57 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomolécules actives
Brillance (optique)
Cheveux -- Soins et hygiène
Cosmétiques
Epaississement
Extraits de plantes:Extraits (pharmacie)
Peptides
Produits capillairesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : It is well reported that hair ageing and repeated external insults, such as chemical damage or mechanical abrasion, cause significant decrease in hair fibre diameter which leads to thin, fragile, lifeless looking hair. NaturePep® Amaranth, part of TRI-K Industries' natural peptide technology platform, is specifically designed to address thin, fragile hair and increase hair diameter and thickness. Amaranth's specific peptide composition ensures a broader range of biological activity and provides multifunctional benefits on the hair fibre. It provides clinically proven benefits such as increase in hair diameter, thickness, bounce, shine and improves overall hair appearance. Note de contenu : - Hair diameter
- Hair shineEn ligne : https://drive.google.com/file/d/1AXn1E3hCQPBRlr71KUeOgTszfddxEn5E/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37252
in GLOBAL PERSONAL CARE > Vol. 23, N° 3 (03/2022) . - p. 55-57[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23259 - Périodique Bibliothèque principale Documentaires Disponible Improving performance / William J. Rosano in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 197, N° 4515 (08/2007)
[article]
Titre : Improving performance Type de document : texte imprimé Auteurs : William J. Rosano, Auteur ; Marie Bleuzen, Auteur ; Gary R. Larson, Auteur ; Leo J. Procopio, Auteur Année de publication : 2007 Article en page(s) : p. 18-21 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique)
Chlorure de polyvinyle
Dioxyde de titane
Encapsulation
Latex
Plan d'expérience
Résistance à l'abrasion
Résistance au lavage
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The performance and appearance of pigmented waterborne coatings strongly depend on the degree to which the various particles (pigments and polymer) are dispersed throughout the dried film. The ideal state of dispersion is usually when all particles are reduced to and remain as non-flocculated primary particles.
Polymer particles, pigments and fillers, not optimally dispersed can adversely affect the ability of the coating to provide adequate barrier (to electrolytes, water, gases, etc) properties. In addition, poorly dispersed pigments and fillers can affect the ability to add colourant as well as paint colour stability under the applied shear forces that can occur during application (eg brushing and spraying).Note de contenu : - More efficient interaction between pigment and latex polymers
- Experimental design
- Improved gloss through more even pigment dispersion
- Improved hiding power
- Superior protective properties
- Improved wash and scrub resistance
- Pigment particles with superior encapsulation
- Quality improvements and cost advantages
- TABLES : 1. Film gloss and gloss retention after UV-A exposure of 18 PVC white paints based on CFM or SM containing binders - 2. Film gloss (20°/60°) as a functionof TiO2 loading of paints based on CFM or SM containing binders - 3. Contrst ratio as a functionof TiO2 loading for paints based on CFM or SM containing binders - 4. Blister formation of 18 PVC white paints based on CFM or SM containing binders after a two week exposure to salt frog - 5. Paint removal after 200 scrub cycles of an above critical PVC paint - 6. Percent latex adsorbed for polymer composition based on CFMs and SMs
- FIGURES : 1. FE-SEM of dried 18 PVC TiO2 paints cast one on top of the other based on composition A using CFM (top half ofimage) and SM (lower half of image) - 2. Coating resistance (Rc) as a function of exposure time to a 5% NaCl solution as derived from EIS spectra of SM (red trace, closed symbols) and CFM (blue trace) based polymers formulated in white gloss paintsEn ligne : https://drive.google.com/file/d/1CGxKiTXix5LafmbC9emeI8eH9Rnd4W0T/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27308
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 197, N° 4515 (08/2007) . - p. 18-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008180 - Périodique Bibliothèque principale Documentaires Disponible Improving the performance of biobased polyurethane dispersion by the incorporation of photo-crosslinkable coumarin / Lorena German-Ayuso in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
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